Transmitter 45-A

Collins Radio Company; Cedar Rapids (IA)

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  • Year
  • 1935
perfect model
  • Category
  • Amateur Transmitter (only)
  • Radiomuseum.org ID
  • 174018

 Technical Specifications

  • Number of Tubes
  • 12
  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Alternating Current supply (AC)
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Transmitter 45-A - Collins Radio Company; Cedar
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 21.5 x 18 x 12 inch / 546 x 457 x 305 mm
  • Notes

  • Collins 45A Transmitter: can be tuned in the range of 1,5 - 30 MHz included 160 - 20 m ham bands, rapid frequency change using plug-in frequency change assemblies, CW (A1) 120 W, AM (A3) 40 W.
    Tubes used are Collins C-100 for the early models and by 1937 replaced by 6L6 as oscillator tube. To keep the date 1935 we use here "unknown_Tube".

    Tube 46 is the 1st doubler, RK-23 used as R-F amp, C830B as 2nd doubler and C-211D (later replaced by 211H) as final, in the speech amplifier two 57 and a 2A3 as power amplifier and in the power supply two 83-V for standard 350V B+ and two 866 mercury rectifiers for 1200 B+ for the final stage.
    One of the first high power grid modulated desktop transmitters used by Radio Amateurs and for commercial and police purposes.

  • Net weight (2.2 lb = 1 kg)
  • 130 lb (130 lb 0 oz) / 59.020 kg
  • Source of data
  • -- Original-techn. papers.
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

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